org.objectweb.asm.CurrentFrame Maven / Gradle / Ivy
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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
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// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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package org.objectweb.asm;
/**
* Information about the input stack map frame at the "current" instruction of a method. This is
* implemented as a Frame subclass for a "basic block" containing only one instruction.
*
* @author Eric Bruneton
*/
final class CurrentFrame extends Frame {
CurrentFrame(final Label owner) {
super(owner);
}
/**
* Sets this CurrentFrame to the input stack map frame of the next "current" instruction, i.e. the
* instruction just after the given one. It is assumed that the value of this object when this
* method is called is the stack map frame status just before the given instruction is executed.
*/
@Override
void execute(
final int opcode, final int arg, final Symbol symbolArg, final SymbolTable symbolTable) {
super.execute(opcode, arg, symbolArg, symbolTable);
Frame successor = new Frame(null);
merge(symbolTable, successor, 0);
copyFrom(successor);
}
}